Product Details

O.S. Engines .37SZ-H Ring 20M Carb OSM14000


O.S. Max .37 SZ-H Ring Helicopter engine has premium performance for 30-sized machines, from extreme aerobatics to stable hovering. Same mounting pattern and muffler dimensions as the .32 SX-H, for easy installation in most 30-size helis. Re-engineered crankshaft reduces vibration resulting in smooth power across the entire RPM range. 20M carburetor with Idle Needle positioned on same side as Main Needle for easier adjustments. This product includes one O.S. Max .37 SZ-H Ring Helicopter Engine, with #8 Glow Plug, 20M Carburetor, instruction manual and sticker sheet.

Heli fuel with 10%-30% nitro content
Displacement: 0.37 cu in (6.07cc)
Bore: 0.806 in (20.5mm)
Stroke: 0.725 in (18.4mm)
Practical RPM range: 2000-21,000
Output: 1.4 PS, 1.38 HP @ 18,000 RPM
Weight: 10.3oz (293g)
Crankshaft Size: 1/4-28
Distance between mounting holes same side: 0.6" (15mm)
Distance between mounting holes opposite side: 1.5" (38mm)
Width including mounting flanges: 1.8" (45mm)
Width neglecting mounting flanges: 1.5" (38mm)
Height/bottom of crankcase to top of cylinder head: 3" (76mm)
Height/bottom mounting flanges to top of cylinder head: 2.4" (61mm)
Distance/center of crankcase to front bearing: 1.8" (46mm)
Distance from backplate to front bearing: 2.6" (67mm)
Distance from backplate to end of crankshaft: 3.7" (94mm)

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